|6" pencil compass/divider designed with a fiberglass ringhead and pivot design for smooth, firm adjustment. Equipped with beam bar extension for circles up to 20"in diameter. Built-in spindle stop prevents overextension. Split leg design accepts interchangeable pen, pencil and divider parts. Slip handle for spare ruling pen. Extra lead, needle point and bolt. Matte nickel finish resists stains and tarnishing.